Safety-elevator.



Patented June 23, 1914,

2 SHEETS- SHEET 1.

B. H. OGKER. SAFETY ELEVATOR,

APPLICATION FILED JUNE 6, 1911.

Bf H. OCKER.

SAFETY BLEVATOR.

APPLICATION vFILED 11111116, 1911.

Pana June 23, 1914.

2 SHEETS-MEET 2.

TOR

M f7 Z Allume] W/TNESSES /33/1/1 ATN r son.

SAFETY-ELEVATOR.

morose.

To all whom. it may concern.'

Be it known that I, BENJAMIN H. Connu? a citizen of the United States, residing a't Marion, in the county of Franklin and State of Pennsylvania, have invented new and useful Improvements in Safety-Elevators, of which the following is a speciiication.

yly invention relates vto elevators 1 and more particularly to a safety device adapted to be applied to elevator cars, said device being designed to be operated automatically i case the cable supporting the cage should break or for any reason become slack.

An object ot' my invention to provide a device of this class which adapted to be applied to elevator cars so as to resiliently `support the same and break the jar of a stoppage when the automatic brake operates upon the breaking of the cable. y

Another object of my invention is to provide new and novel means adapted to bring the elevator to a stop instantaneously when the cable breaks or becomes slack. y A still further object is to provide a device of this class which shall be simple and eiiicient in operation, but which at the same time may be manufactured and placed upon the market 'at a low cost.

With the foregoing and other objects in view, my invention consists in such'details of. construction and in the arrangement and combination of parts as will be hereinafter more fully described and specifically pointed out in the appended claims.

In describing my invention in detail, reference will be had to the accompanying drawings in which like iclntracters denote like or corresponding parts throughout the several views and in which :iq

Figure l is a vertical sectional view of an elevator car with my invention applied thereto. Fig. 9 is a` detailed vertical sectional View taken at right angles to the up per `part or" Fig. 1. Fig. 3 is a detailed' viewl :n section. showing one of the pawls in plan.

ln carrying my invention into practice l provide the usual elevator cage 1, -with recessed sides 2, said recesses being provided for the reception of a portion of the apparatus to be hereinafter described. Erected upon -theroofl of the cage 1 and connected thereto in any desired manner is a perpenditzular rod 3 a beam l being slidabl'v mount ed on' saidy rod, said beam extending transversely of the top of the cage. The beam 4 has atubularmember 5 extending upwardly ltubular member is 'a collar l' .the ends of.' the `each side of the well of the Specification of4 Letters Patent. Patentgd June 23, 19514 applicativa fue@ June e', 1911. semi no. 631,507.

therefrom and guided by the rod 3. The tubular member is preferably connected to the beam by means of a ase Hangs 6 which is bolted to said beam. Immediately above the base flange G and preferably integral with the smaller in diameter than said base liange for purposes which will be hereinafter more fully understood.

A sleeve 8 is slidably mounted upon the member 5, ball bearings 9 being provided within said sleeve so as to bear against the tube and thus reduce the friction to a minimum. The lower part of the sleeve is provided with a collar or liange 10 with which and the said collar 7 hereinbefore lmentioned are connected the'ends of a coil spring 11, which spring -encircles the tube 5 and tends to draw said sleeve downward 4upon said tube, means hereafter described being employed to counteract the tendency of said the cage is intact and taut. Extending laterally from said sleeve at approximately diametrically opposite points are arms 12 to which are pivot-ally connected the upper ends of rods 13, the lower ends of which are pivoted in slots 15 in pawls 14, which are slidably mounted' in the recessed ends of the beam 4. Thus it will be seen that when the coil spring 11 is relieved of tension the sleeve 8 will be pulled downward whereby through the medium of the rods 13, the pawls 14 will be projected outwardly beyond bea-m et. Vhen the pawls are thus projected, they are arranged to engage with toothed racks 16 mounted at shaft, said racks being of usual construction. Guards 17' are positioned on each side of said racks so as to receive and guide the ends of the beam et and insure the engagement of the pawls with the racks. l

ln order to limit the upward movement of the sleeve 8 a nut 18, issecured upon the upper end of the tube Said nut has a head 19 which slidablyreceives the rod Extending laterally from the head 19 in diret-tions approximately at right angles to the arms 1Q. are arms 20, said arms being supported at their outer ends by meansof standards 21 upon the beam 4.' Pivotally mounted on said standards are lever arms 00 the ends of which are normally engaged by lugs 23 .extending from opposite sidesV spring while the cable supporting l slidablytted upon and somewhat leys 25 mounted in brackets 2T on the beam the supporting cable 29 in any desired man- 4. From the pulleys 25 the cables are led upwardly to a clip 28, which is fastened to ner.

It will be seen from the foregoingthat lwhen the cage or car is supported by the cable 29 and this cable is. taut the cables 24 will hold the outer ends 'of the lever' arms 22 downward and the inner ends upward so that the sleeve 8 is held in its highest possible position. Should the cable 29 break or become slack however the cables 24 will become slack, thus permitting the coil spring 'll to pull the sleeve down, the downward movement of the sleeve resulting in outward movement of the pawls as before described. The lower end of the cable 29 below theclip 23 is divided into strands 30 which extend downwardly and are connected to the roof of the car in any manner desired.

`It will be readily understood upon reference to Fig. l that when the pawls ll engage the racks 16 the beam l will slide upwardly upon the rod 3. In order to limit this movement and to cushion the resulting shock to the car following the breakage of the cable I provide air tanks on each side of the car which are disposed within the recesses 2 mentioned above. Each tank is provided with a cover 31 removably secured thereto, said cover having a depending boss 32 which is externally screw threaded so as to receive an internally screw threaded cap 33 as will .be clearly seen upon reference to the drawin s. Disposed between the cap 33 and the oss 32 is a packing washer 34 of usual construction. Plungers 35 are mounted for reciprocation in the cylinders and are provided with rods 36 which extend upwardly therefrom -and through the packing 34: andl boss 32, in the cover 31 and are connected as at 37 to the beam 4. These cylinders may be connected to the car in any -desired manner, I having illustrated them as being connected to platforms or supports 38 extending from the sides of said car.

The operation of my device is so simple that it is thought a detailed description thereof need not be entered into it being i lclearly apparent from the foregoing.

` It will be seen that I have provided a simple safety appliance which will absolutely prevent the fall of the car upon the breaking of the cable. The parts are few and not likelyto get out of order and all are readily accessible for repairs lor substitution be-` cause of wear. V

I desire it toA be understood that the .foregoing is merely one form of my invention which is used to illustrate the principle and (hat slight changes in the construction and in the mode of operation may be resorted to whenever desired or whenever circumstances warrant, provided such changes fall within the scope of the appended claims. In order that the escape'of air from the cylinders may be regulated, each cylinder is provided with escape Valves 36 and 3G", the valves 36 being located adjacent the upper ends of the cylinder and the valves 36h being located adjacent the lowerends thereof.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is l. In combination with an elevator cage, a beam on top of said elevator cage, pawls carried by said beam, a member mounted on saidbeam, a sleeve on said member, `means for drawing said sleeve down on said member, and means connecting said sleeve and said pawls whereby the latter may be operated.

2. In combination with an elevator cage, a beam yieldingly mounted on top of said elevator cage, means for holding said beam in position on top of said elevator cage,

pawls carried by said beam, a member mounted on said beam and over said means, a sleeve slidable on said member, means for drawing said sleeve down on said member,

and means on said sleeve having connection to said pawls whereby the latter may be operated.

3. In combination with an elevator cage, and a` cable supporting saidelevator cage, a beam on top of said elevator cage, pawls carried by said beam, a. member mounted on said beam, a sleeve slidable on said mem' ber, means for maintaining said sleeve at the upward limit of its movement on said member, and means for supporting said.

means.

Il. InI combination with an elevator cage, and a cable supporting said'elevator cage,

rip

a beam on top of said elevator cage, pawls carried'by said beam, a member mounted on said beam, a sleeve onl said member, a

brace above said sleeve, standards mounted on said beam and connected to the opposite ends of said brace, means on said standards l adapted to engage said sleeve whereby the latter may be held from downward movement on said member, and means for maintaining said means in operative position.

5. In combination with an elevator cage, and a cable supporting said elevator cage, a beam on top of said elevator cage, pawls carried by said beam, a member mounted on said beam, a sleeve slidable'on said member, means for maintaining said sleeve at the upward limit Tof its movement, means.

,for supporting said means, cylinders secured .to said elevator cage, plungers in said cylinders, and means for connecting said'plungers and said beam whereby said elevator cage may be brought to a gradual stop.

6. In combination with an elevator cage,

rails'and racks on both sides of the elevator shaft, a beam slidably mounted on the ,topp

of 'said elevator cage, pawls carried by said beam, a membermounted on said beam, a sleeve on said member, arms connecting the pawls'and sleeve,land means on said member for the extending of the arms connected to said pawls, whereby said pawls may be thrown into said rack for vthe Apurpose de-A scribed. c A y 7. In an elevator, a suspension cable, a beam... a cage yieldably supported by the beam, racks arranged opposite the ends of the beam, pawls upon the beam arranged lto engage with` the racks, means connected with the pawls and having a tendency to more the same into engagement with the racks, a detent-lever coperatng with the saidmeans and 'arranged to normally restrain the same from operation, and a flexible element connected to -the sald detent lever and to the said suspension cable andv pawls upon the beam 'arranged to engage i with the racks, a member upstanding arranged to move the -ment with their respective rackswhen the connection between the sleeve and the pawls awls into engagesleeve is'vslid in one direction upon Ithe said member, a spring tending to move' the sleeve in such direction, and means connected with the suspension cable and having operative connection With the sleeve to normally re-r A strain the same against movement to pro.- ject the pawls.

. 9. In an elevator, a suspension cable, va beam, a cage supported by the beam, racks arranged opposite the ends of the beam,

pawls upon the beam arranged to engage with the racks, a member upstanding from the beam, a sleeve slidable upon the member, connection between the sleeve and the pawls arranged to move thepawlsinto engagement with their 'respective Jracks when the sleeve is slid in one direct-Rui upon the -said'membeiga spring tending-6to move the sleeve in suc-h direction, a. detent-lever engaging with the sleeve and arranged to normally hold the same against such movement, anda flexible element connected with the said4 lever and with e suspension cable and normally held tantiby said cable Whereby to hold the datent-lever inoperative position v BENJAMTNH. OCKERL'` V Witnesses:

A. L. SBLERK, v -A. BURKHART.

Copies o! tlm4 patent my be obtained tar ve c'nts each. byaddressing the` Commissioner o( 'PatentsI 

